Flying shears for rod or bar mills.



PATENTED NOV. 19, 1907,

W. H. STANTON.

FLYING SHEARS FOR ROD 0R BAR MILLS.

APPLIOATION FILED SEPT.3,1907.

WILLIAM H. STANTON, OF CHICAGO, ILLINOIS.

FLYING SHEARS FOR ROD OR lBAR MILLS.

Specification lof Letters g Patent.

Patented Nov. 19, 1907.

Application led September 3. 1907. Serial No. 391.048.

To all 'whom 'it may concern:

Be it known that I, WILLIAM H. STANTON,

I a citizen ofthe United States, residing in Chicago, in the county of Cook and State of Illinols, have invented a new and useful Imrovement in Flying Shears for Rod or Bar Mills, of which the following is a specification.

' My invention relates to im rovements in iiying shears for rod or bar mil s.

The object of my invention is to provide a lyino' shear for cutting rods or bars tol 'ciprocatlng and non-reciprocatinv knives or cutters of the shear are mounted, a spring forreturning the swin ing shear frame to osition after each stro e of the shear and a cylinder and piston for operating the shear, of an exhaust or release valve for sett-ing the shear in `operation having a hand lever for positively moving said valve to open the exaust, an adjustable stop for limiting the opening movement of the valve, and a spring for automatically and quickly returning the valve to osition to close the exhaust, the cylinder eing provided with a by-pass to I,cause the steam or other operative Iluid to quickly cushion and arrestthe stroke of the piston `the instant the shear severs the rod or bar, so as to prevent hammering or pounding action, and so as to enable the spring which acts against the swinging frame of the shear to restore it to position, the by-pass causing the steam or operative-uid pressure to balance on both sides of the piston, and thus enabling the shear frame spring to return such frame into .position for the next stroke. Myxinvention also consists in the novel construction of parts and devices and in the novel combinations of arts and devices herein shown and descrl ed.

In the accompaying drawing, forming a part of this specification, Figure 1 is a side elevation partly in vertical section, of a iiying shear embodying my invention; Fi 2 a .cross section on line 2-2 of Fig. 1; wig. 3

is a section on line 3-3 of Fig. 2, and Fig. 4 is a partial section on line 4 4 of Fig. 1.

In the drawing A represents the bed or main frame of the machine, and A1 the continuously driven feed rolls of the rod or bar mill, by which the rod or bar X is cont-inuously fed or advanced to the flying shear by which it is cut into lengths.

B is the movable or swinging frame of the flying shear pivoted to the main frame at b, and upon which the knives or cutters b1 b2 of the shear are mounted, the former iixedly thereon, and the latter carried by the reci rocating cross head b3 which slides in suitab e guides or ways b4 on the Swingin shear rame B. The reciprocating cross ead b3 which carries the movable or reciprocating cutter or shear has a trunnion or pivot b5 pivotally connectin it to the swinging links C which are pivotally connected to the main frame A at C1, and also for pivotally connectin it with the stem d of the operating piston of the cylinder F.

E is the spring which acts against the swinging shear-frame B to restore it to position. Il surrounds a guide rod El attached to the mainframe A, and acts a ainst a movable cap E2, which is connecte by links E3 with the swinging shear frame B.

The operatmg cylinder F is furnished at its upper end with an inlet port f for the steam or operative iluid under pressure employed for actuating the shear, and with an exhaust port j" near its lower end which-communicates with the exhaust port g in the casing or shell G of the exhaust or release valve G1. The operating c linder F is also provided with a by-pass f2 eading from the upper middle portlon of the cylinder to-near thev lower end thereof, as will be readily understood from Figs. 1 and 4, so that after the piston has moved on its down stroke sufficiently to cause the shear to completel sever the rod or bar, the steam or other Hui( under'l hammering, and also cause the fluid pressure to be equalized or balanced on the opposite sides of the piston, and thus enable the shear frame spring E to automatically returnor store the swinging shear frame B to position for the next successive stroke or operation.

The exhaust or release valve G1, or its stem g1, is furnished with a hand-operated lever g2 by which the valve is positively moved to open the exhaust and thus set the shear in operation. This. hand-operated lever g2 is provided with a spring g3 by which the valve is automatically and quickly returned to position to close the exhaust. To positively limit the opening movement of the valve an adjustable stop g4 is provided,

the same consisting preferably of a screwfurnished with nuts g5 g5.

The operation is as follows: The rod X is continuously fed or advanced by the feed rolls A1, and when the desired length of rod has been fed or advanced between the upper and lower-cutters of the shear, the operator with his finger momentarily pulls back the hand lever g2 of the exhaust valve Gr1 against the stop g4, and then releases the hand lever the instant the valveg1 strikes` the stop g4,- thus permitting the spring gi3 to at once again return the valve to its normal position and close the exliaust. During the short interval that the exhaust is thus opened the steam or other fluid pressure acting against the upper face of the piston causes the same to make a down stroke of sufficient length to o erate the u per or reciprocating cutter of t e shear an sever the rod. The moment the rod is thus severed the piston passes the upper end of the by-pass'j'Z, at which time the spring g3 has closed the exhaust, and the steam or other operative iiuid under pressure iows through the byass to the lower side of the piston, thus equa izing or balancing the pressure thereon, and then the-shear frame spring E returns the swinging shear frame B to position for the next operation.

u The hand lever g2 is, ordinarily, not grasped directly by the hand, but by a hook or pull rod or wire which is held by the operator `in his hand.

I claim:

v1. In a swinging shear for rod or bar mills, the combination with the feed rolls, swinging shear frame, furnished with cutters, and a spring for returning the swinging shear frame to position, of an operating cylinder and piston, and an exhaust or release valve for setting the shear in operation, said cylinder.

being furnished with a by-pass to cushion and arrest the stroke of the piston after the shear has severed the rod or bar and to enable said shear frame spring to restore the swinging shear frame to position, substantially as specified.

2. In a swinging shear for rod or bar mills,

the combination with the feed rolls, swinging shear frame, furnished with cutters, and a spring for returning the swinging shear frame to position, of an operating cylinder and piston, an exhaust or release valve for setting the shear in operation, said cylinder being furnished with a by-pass to cushion and varrest the stroke of the piston after the shear has severed the rod or bar and to enable said shear frame sprin to restore the swinging shear frame to position, and a hand lever for operating said release valve, substantially as specified. l

3. In a swinging shear for rod or bar mills, the combination with the feed rolls, swinging shear frame, furnished with cutters, and a spring for returning the swinging shear frame to position, of an operating cylinder and piston, an exhaust or release valve for setting the shear in operation, said cylinder being furnished with a by-pass to cushion and arrest the stroke of the piston after the shear 'has severed the rod or bar and to enable said shear frame spring to restore the swinging shear frame to position, a hand lever for operating said release valve, and a spring fpr closing the same, substantially las speci- 4. In a swingingshear for rod or bar mills,

the combination with the feed rolls, swinging shear frame furnished with cutters and a spring for returning the swinging shear frame to position, of an operating cylinder and piston, an exhaust or release valve for setting the shear in operation, said cylinder bein furnished with a by-pass to cushion an arrest the stroke of the piston after the shear has severed the rod or bar and to enable said shear frame spring to restore the swinging shear frame to position, ak hand lever for operating said release valve, a spring for closing the same, and a stop for limiting theV opening movement of the release valve, substantially as specified.

5. In a swinging shear for rod or bar mills, the combination with the feed rolls, swinging shear frame furnished with cutters and a spring for returning the swinging shear frame to position, of an operating cylinder and piston, an exhaust or release valve for setting the shear in operation, said cylinder being furnished with av by-pass to cushion and arrest the stroke of the piston after the shear has severed the rod or bar and to/ enable said shear frame spring to restore the swinging shearframe to position, a hand lever for operating said release valve, and an adjustable stop for limiting the opening movement pf Cthe release valve, substantially as speci- 6. In a swinging shear, the combination with the swinging shear frame and cutters l thereon, of a spring for returning it toposispring cushioning the stroke of said piston,

tiollll, an ollerating oylirflderland pistllll, lsu substantially as specified. ex aust va ve, a. sprin or c @sin an o ing closed said valve, stop for limiting the l WILLIAM H' STANTON 5 opening movement of said valve, and means Witnesses:

for positively ofening the velve, the auto- WILLIAM A. GEIGER, matlo closing'o said release valve by said JOHN W. STANTON. 

